Overview
The NCP5661MNADJT2G, produced by onsemi, is a high-performance, low dropout linear regulator designed for high-power applications requiring up to 1.0 A of current. This device is available in both fixed and adjustable output versions, with output voltages as low as 0.9 V. The NCP5661MNADJT2G features ultra-fast transient response times, low noise without a bypass capacitor, and additional functionalities such as Enable and Error Flag for the fixed output version. It is packaged in a thermally robust 5-pin DFN 3x3.3 mm, making it suitable for a variety of high-current applications.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage | Vin | 2.0 | - | 9.0 | V |
| Output Voltage Accuracy (TJ = 25°C, Iout = 10 mA to 1.0 A) | Vout | -1% | - | +1% | % |
| Output Noise Voltage (f = 10 Hz to 100 kHz) | Vn | - | 26 | - | μVrms |
| Dropout Voltage (Iout = 1.0 A) | VDO | 1.0 | - | 1.3 | V |
| Peak Output Current Limit | Iout | - | - | 1.0 | A |
| Internal Current Limitation | Ilim | - | - | 1.5 | A |
| Ripple Rejection (120 Hz) | RR | - | - | 70 | dB |
| Thermal Shutdown | TSHD | - | - | 160 | °C |
| Ground Current (Iout = 1.0 A, Disabled State) | Iq, Iqds | 1.3, 10 | - | 3.0, 300 | mA, μA |
| Enable Input Threshold Voltage | Ven | 1.3 | - | 0.3 | V |
| Enable Input Current | Ien | - | 0.5 | - | μA |
Key Features
- Ultra-Fast Transient Response: Settling time of 1-3 μs, ensuring quick recovery from load transients.
- Low Noise: 26 μVrms output noise without a bypass capacitor.
- Enable Functionality: Allows for on/off control of the regulator.
- Error Flag (Fixed Output): Provides a logic low signal when the output voltage drops below the nominal value.
- Thermal Robustness: Available in 5-pin DPAK and DFN 3x3.3 mm packages with low ground current.
- High Current Capability: Supports up to 1.0 A of output current.
- Internal Current Limitation: Limits peak output current to 1.5 A to prevent excessive power dissipation.
- Ripple Rejection: High ripple rejection of 70 dB at 120 Hz and 65 dB at 1.0 kHz.
- Thermal Shutdown: Guaranteed by design to protect against overheating, with a thermal shutdown temperature of 160°C.
Applications
The NCP5661MNADJT2G is suitable for a variety of high-power applications, including:
- Server Power Supplies: High-current requirements and fast transient response make it ideal for server applications.
- ASIC Power Supplies: Supports the high current and low noise requirements of Application-Specific Integrated Circuits (ASICs).
- Networking Equipment: Used in networking devices that require stable and high-current power supply.
- Other High-Power Applications: Suitable for any application requiring high current, low dropout voltage, and fast transient response.
Q & A
- What is the maximum output current of the NCP5661MNADJT2G?
The maximum output current is 1.0 A.
- What are the available output voltage options for the NCP5661MNADJT2G?
The device is available in both fixed and adjustable output versions, with fixed output voltages ranging from 0.9 V to 3.3 V.
- What is the dropout voltage of the NCP5661MNADJT2G at 1.0 A output current?
The dropout voltage is between 1.0 V and 1.3 V.
- How does the Enable function work on the NCP5661MNADJT2G?
The Enable pin allows for on/off control of the regulator. Connecting it to ground disables the device, while connecting it to Vin enables it.
- What is the purpose of the Error Flag in the fixed output version of the NCP5661MNADJT2G?
The Error Flag produces a logic low signal when the output voltage drops below the nominal value, indicating an error condition.
- What is the recommended input capacitor for the NCP5661MNADJT2G?
A 150 μF OSCON capacitor with an Equivalent Series Resistance (ESR) of 50 mΩ is recommended.
- What are the thermal shutdown and ground current characteristics of the NCP5661MNADJT2G?
The thermal shutdown temperature is 160°C, and the ground current is 1.3 mA to 3.0 mA when the device is enabled and 10 μA to 300 μA when disabled.
- How does the ripple rejection of the NCP5661MNADJT2G perform?
The ripple rejection is 70 dB at 120 Hz and 65 dB at 1.0 kHz.
- What are the package options for the NCP5661MNADJT2G?
The device is available in a 5-pin DFN 3x3.3 mm package.
- What are some typical applications for the NCP5661MNADJT2G?
Server power supplies, ASIC power supplies, networking equipment, and other high-power applications.
